We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
A36 sheet metal bend radius.
Subtract twice the leg length from the initial length to determine the bend allowance.
The perfect bend has a radius that s equal or close to the material thickness.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
There are inside bend radius recommendations listed for some of the steel grades that we stock.
You described a rough rule to find a steel s minimum bend radius.
They are shown in relation to the material thickness.
In a previous bending basics article you mention a material s tensile reduction percentage used for calculating the minimum inside bend radius of various metals.
Plug the bend allowance ba the bend angle b inside radius ir and material thickness mt into the below equation to determine the k factor k.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal.
This page is mainly introduced the astm a36 datasheet including chemical information mechanical properties physical properties mechanical properties heat treatment and micro structure etc.
4 1 893 2 214.
The minimum bend radius data shown in these charts is measured to the inside of the bend.
Specifically the perfect bend s radius ranges from the minimum radius value up to 125 percent of the material thickness.
Use this document to choose values that are both manufacturable and meet your needs.
The same inside bend radius cannot be used for all steel grades.
For example using a steel plate an ibr recommendation of 1 5t would equal an inside bend radius of 3 8 250 x 1 5 375.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
It also contains the use of astm a36 such as it is commonly used in bars sheet plates steel coils steel pipes forged and other materials application.
For our example it comes to.
Divide 50 by the material s reduction percentage as specified by the material supplier subtract by 1 and then multiply by the plate thickness.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
Bend radii minimum bend sizes.
Specifing a bend radius from here will help prevent hair line cracks.
